不含过渡金属的C–N和C–C的形成:由炔酮合成苯并[4,5]咪唑并[1,2- a ]吡啶和2-吡啶酮
摘要:
在此,已经揭示了在温和条件下炔烃与2-甲基苯并咪唑的无过渡金属的有效级联反应。该级联反应涉及迈克尔加成/分子内环加成/脱水,并以中等至良好的产率提供了所需的苯并[4,5]咪唑并[1,2- a ]吡啶。此外,三种苯并[4,5]咪唑并[1,2- a ]吡啶(3d,3i和3q)对Hep-G2(人类肝癌),T-24(人类膀胱癌细胞)和SK-OV-3(人类卵巢癌)细胞系,IC 50值在8.05–10.67μmolL -1范围内。为了研究有效抑制细胞生长的机制,对细胞周期分析,凋亡率检测,Ca 2+生成的测量,ROS,线粒体膜电位测定和caspase-3 / 9活化进行了进一步的研究。化合物3i。
A direct, one-pot and regioselective access to N-alkyl- and N-aryl-substituted 2-pyridones is described from readily available β-keto amides and either primary or secondary propargylic alcohols. This approach involves the combination of two different cooperativehomogeneous and heterogeneous catalytic systems based on a transition metal oxide and a supported organocatalyst, respectively.